It looks like Russia and the UK are really going at it. First there was an effort by someone to knock off Boris Berezovsky, a person who had announced his intention to change the Russian government forcibly via extralegal means. Now, as AJ-Strata discusses at his blog, the Russians are refusing to extradite the man the Brits say poisoned Alexander Litvenenko.
I would refuse extradition, too. Unless, that is, the British will extradite Berezovsky to face the appropriate legal process for his announced intentions.